Can someone explain the difference between two different 1947 Mack "L" Model fire trucks? The Boston Fire Department had several fire trucks delivered during 1947 from Mack. The Model numbers are of a different type, though. For example, the first is Serial # 85LS1152. The second is Serial # 19LS1064. I'm guessing the last four numbers are the individual identification for that truck. But what is the difference between a "Model 85LS" and a "Model 19LS?" Is/are the difference(s) visible? Also, can anyone recommend a good book and/or website on Mack "L" fire apparatus? Many thanks in advance.
